Carth the Lion

Whenever this enters the battlefield or a planeswalker you control dies (is put into the graveyard from the battlefield), look at the top
seven cards of your library. You may reveal a planeswalker card from among them and put it
into your hand. Put the rest on the bottom of
your library in a random order.
Planeswalkers' loyalty abilities you activate cost as
an additional +1 to activate.